If you are a renovation contractor working on occupied buildings in Ontario, standard builders risk insurance is probably not doing what you think it is doing. The coverage gaps that show up on occupied building renovation projects are among the most expensive surprises in construction insurance Ontario contractors face. This guide walks you through exactly where those gaps appear, what insurers actually look for when they underwrite your policy, and how to make sure your coverage holds up when a claim happens. If you are reviewing a contract, responding to a tender, or starting a project next month, this is the right time to read it.
Renovation contractors in Ontario operate in a different risk environment than new build contractors. The building is already standing, tenants may still be inside, the existing structure belongs to someone else, and your work interacts with systems that were installed decades ago. That combination creates coverage questions that a standard builders risk form was never designed to answer cleanly. For a full breakdown of how builders risk insurance in Ontario applies to renovation and construction projects, Boardwalk Insurance covers the core product in detail.
Who This Applies To
This article is written for Ontario renovation contractors, general contractors managing occupied building upgrades, subcontractors working on institutional and commercial renovations, and property owners who hire contractors and want to understand their own exposure. If your work involves any of the following, the coverage rules discussed here apply directly to you:
- Interior tenant improvement projects in occupied office or retail buildings.
- Phased renovations in occupied residential buildings or condominiums.
- Hospital, school, or municipal building renovations where the facility stays open during construction.
- Heritage building restorations where existing structure value is significant.
- Mixed use building upgrades where ground floor retail stays active while upper floors are under renovation.
- Mechanical, electrical, or plumbing upgrades in buildings with active tenants.
Ontario contractors responding to public sector tenders or signing commercial leasehold improvement agreements are routinely asked to provide certificates of insurance confirming builders risk or course of construction coverage. If your certificate does not reflect the actual scope of your project, you are exposed. Connect with the construction insurance team at Boardwalk to make sure your certificate matches your contract before the project starts.
What Is Covered and Not Covered
What Builders Risk Covers on a Standard Form
A standard builders risk policy covers materials, labour, and equipment that form part of the work in progress. It responds to physical loss or damage caused by named perils including fire, theft, vandalism, wind, and water. On a ground up new build, this is relatively straightforward because the only structure at risk is the one being built.
Course of Construction coverage: The insurance term for builders risk on a new build, covering the structure from the first pour or frame until substantial completion.
Existing structure: The portion of a building that was in place before renovation work began. This is the most commonly uninsured element in an occupied building renovation project.
Where Standard Forms Fall Short on Occupied Buildings
The moment your renovation project touches an occupied building, several coverage limitations appear that most contractors do not discover until after a loss.
Existing structure exclusion: Most standard builders risk forms do not automatically cover the existing building. They cover the new work only. If a fire starts in your work area and damages a wall that was already there, the existing structure damage may not be covered under your builders risk policy. The building owner's commercial property policy may respond, but it may also exclude losses caused by renovation activity, especially if the owner failed to notify their insurer that work was underway.
Occupied building exclusion: Some builders risk forms include exclusions or sublimits that apply when the building continues to be used or occupied during construction. An office building where employees are still working on floors above your renovation site is a prime example. Insurers view occupied buildings as higher risk because fire suppression access is more complex, evacuation is harder, and the potential for liability is greater.
Practical example one: A general contractor renovating a retail unit in a Mississauga strip mall cuts into a wall and accidentally damages the sprinkler system. Water floods the existing ceiling tiles, flooring, and tenant inventory in the adjacent unit. The builders risk policy covers the new materials installed by the contractor. It does not automatically cover the existing ceiling or floor, and it does not cover the tenant's stock. That gap lands on the contractor's commercial general liability policy, and if the CGL limit is insufficient, it lands on the contractor personally.
Practical example two: A contractor in Toronto is completing a phased office tower renovation. A theft occurs overnight and equipment stored on site is taken. Standard builders risk covers the stolen equipment. But if the thieves also damage the existing elevator lobby to gain access, that repair cost falls outside the scope of most standard builders risk forms unless existing structure coverage was specifically added.
Soft costs and delay coverage: Occupied building renovations frequently run over schedule because of tenant disruptions, access restrictions, and discovery of hidden conditions like asbestos or knob and tube wiring. Soft costs coverage reimburses architects, engineers, permits, and carrying costs if the project is delayed by an insured loss. This coverage is not automatic and must be requested.
Soft costs: Non construction expenses that accumulate when a project is delayed due to a covered loss, including financing charges, re permitting fees, and professional fees for revised drawings.
Common Claim Scenarios for Renovation Contractors
Ontario renovation contractors encounter a predictable set of loss scenarios on occupied buildings. Understanding these helps you confirm that your policy is structured to respond before the claim happens.
- Fire caused by hot work such as welding or torch applied membrane roofing that spreads to the existing structure.
- Water damage from a plumbing tie in gone wrong, flooding occupied floors below the renovation zone.
- Theft of materials and tools from an unsecured site in an otherwise occupied building with multiple access points.
- Collapse of a load bearing element weakened by renovation cuts, damaging existing structure and injuring a building occupant.
- Discovery of hazardous materials mid project causing a stop work order, project delays, and soft cost accumulation.
- Vandalism in a partially completed space accessible through the occupied building's common areas.
- Sewer backup during a drain tie in that damages existing tenant improvements on lower floors.
If you have had a claim or are approaching a renewal after a loss, Boardwalk's claims support team can help you understand what was covered and what was not, and how to structure the next policy to close those gaps.
Cost Drivers and Underwriting Questions Insurers Actually Ask
When an insurer is underwriting builders risk insurance for an occupied building renovation in Ontario, they are trying to answer a specific set of risk questions. Knowing these questions in advance helps you prepare a submission that gets better pricing and fewer exclusions.
Project Characteristics
- What percentage of the building will be occupied during construction?
- Is the renovation happening in phases, and if so what is the handover schedule between phases?
- What is the total completed value of the project including existing structure if coverage is requested?
- Does the project involve any hot work, and is there a written hot work permit program in place?
- What is the construction type of the existing building: wood frame, masonry, steel, or concrete?
- How old is the building and are there any known hazardous materials such as asbestos or lead?
Contractor Qualifications
- How many years has the contractor been operating in Ontario and what is their annual revenue?
- Does the contractor have a WSIB clearance certificate in good standing?
- What is the contractor's prior loss history over the past five years?
- Are all subcontractors required to carry their own insurance with the general contractor named as additional insured?
WSIB clearance certificate: A document issued by the Workplace Safety and Insurance Board in Ontario confirming that a contractor is registered and in good standing, commonly required by property owners and general contractors before site access is granted.
Premium on occupied building renovation projects typically runs higher than ground up new builds of similar value because of the existing structure exposure and the complexity of managing a live building during construction. Expect insurers to apply sublimits on existing structure coverage, especially for older wood frame buildings. The commercial property insurance held by the building owner also factors into the underwriting conversation because insurers want to know how the two policies coordinate.
How to Reduce Premium Without Reducing Protection
Practical Risk Controls That Insurers Recognize
Reducing your premium on occupied building renovation coverage is not about removing coverage. It is about demonstrating to the insurer that your operation manages risk in documented, consistent ways. The following controls have a direct impact on how underwriters price your file.
- Implement a written hot work permit program that requires daily sign off and a fire watch period of at least one hour after all hot work ceases.
- Install temporary hoarding with fire rated panels to separate the construction zone from occupied areas.
- Require all subcontractors to provide certificates of insurance naming your company as additional insured before they step on site.
- Maintain a daily site log documenting inspections, hazard identification, and any incidents even minor ones.
- Secure all materials and tools in locked enclosures at the end of each work day, especially in buildings with after hours public access.
- Notify the building owner's insurer in writing before renovations begin so their commercial property policy is not voided by a failure to disclose.
- Use a builder risk vs property insurance comparison tool to identify which losses fall under which policy before you start.
You can also use the builder risk vs home insurance renovation checker on the Boardwalk website to work through coverage questions on specific project types before you finalize your insurance program.
Quick Checklist
- Confirm whether your builders risk policy includes existing structure coverage and at what limit.
- Verify that the occupied building exclusion does not apply to your project or that it has been endorsed off the policy.
- Obtain a WSIB clearance certificate before site mobilization and keep it current throughout the project.
- Collect certificates of insurance from every subcontractor naming you as additional insured before they begin work.
- Notify the building owner and their insurer in writing before construction begins.
- Confirm your commercial general liability limit is sufficient to cover a worst case loss to the occupied portion of the building.
- Ask your broker whether soft costs and delay in opening coverage is included or available as an endorsement.
- Check that your certificate of insurance matches the exact coverage requirements in your contract or tender documents.
Mistakes That Cause Coverage Gaps
Mistake one: Assuming the building owner's property insurance covers your work. The building owner's commercial property policy covers their building. It does not cover your materials in progress, your tools, or your liability for damage you cause to their building. These are your exposures and they belong on your policy.
Mistake two: Not disclosing that the building is occupied. If you apply for builders risk insurance and do not disclose that tenants will be present during construction, the insurer can deny a claim on the basis of material misrepresentation. Always tell your broker the full picture of how the building will be used during the project.
Mistake three: Letting a subcontractor on site without a certificate of insurance. If an uninsured subcontractor causes a loss, the claim comes back to your policy. Ontario project owners and lenders are increasingly specific about subcontractor insurance requirements and will hold the general contractor responsible when a subcontractor is uninsured.
Mistake four: Undervaluing the project for premium savings. Builders risk policies are subject to coinsurance clauses. If you insure a project at 60 percent of its actual value to save on premium and a partial loss occurs, the insurer will apply a coinsurance penalty and you will pay a proportional share of every claim. Use the coinsurance penalty simulator to understand what that means in dollar terms before you choose your coverage limit.
Mistake five: Failing to extend the policy when a project runs long. Builders risk policies have a fixed expiry date. If your project runs over schedule and the policy lapses before substantial completion, you are uninsured for any loss during the gap period. Ontario renovation projects frequently run over schedule. Build extension options into your policy from the start and track your expiry date actively.
Frequently Asked Questions
Does builders risk insurance cover an occupied building in Ontario?
It can, but not automatically. Standard builders risk forms often exclude or sublimit losses on occupied buildings. You need to confirm with your broker that the occupied building condition is addressed specifically in your policy wording, either by endorsement or by purchasing a form that was designed for renovation rather than new construction.
Who buys the builders risk policy on a renovation project: the contractor or the owner?
Either party can purchase it and practice varies by contract type. In Ontario, many commercial leasehold improvement contracts require the tenant or contractor to carry the builders risk policy. Institutional contracts often require the general contractor to place it and name the owner as an additional insured. Review your contract language carefully and confirm the requirement with your broker.
What is the difference between builders risk and commercial property insurance on a renovation project?
Builders risk covers work in progress, materials stored on site, and in some cases the existing structure during the renovation period. Commercial property insurance covers the completed building and its permanent contents. These two policies need to coordinate so that neither leaves a gap during the transition from construction to occupancy. Builders risk vs property insurance Ontario is a common underwriting conversation and one worth having with your broker before the project starts.
Does my commercial general liability cover damage I cause to the building I am renovating?
Your CGL covers third party bodily injury and property damage claims. If your work damages a portion of the building you did not physically touch, CGL typically responds. However, damage to the specific portion of work you are working on is often excluded under the care, custody, and control exclusion. This is a nuanced area and the answer depends on the specific wording of your policy. Ask your broker to walk through the exclusions with you.
Is WSIB coverage required on renovation projects in Ontario?
Yes. Contractors performing work in Ontario are required to be registered with WSIB if they meet the registration thresholds under the Workplace Safety and Insurance Act. Building owners and general contractors routinely require WSIB clearance certificates before allowing site access. Failure to maintain WSIB registration in good standing can also affect your ability to obtain or renew insurance in some markets.
What happens if a tenant's property is damaged during renovation work?
Damage to a tenant's contents or improvements caused by your work is a third party property damage claim that would typically be directed to your commercial general liability policy. The tenant's own business insurance may also respond and seek recovery from you or your insurer. This is one of the most common claim scenarios on occupied building renovations and a strong reason to carry CGL limits appropriate to the value of the building and its contents.
Can I get coverage for tools and equipment left on site overnight in an occupied building?
Tools and equipment coverage is typically added to a contractors policy as an inland marine floater or as an endorsement. Builders risk policies do not automatically cover tools. In occupied buildings where site security is shared with tenants and building management, theft exposure for tools and equipment is elevated. Confirm that your tools are scheduled and covered for their replacement value, not depreciated value.
How far in advance should I arrange builders risk coverage before a project starts?
Give your broker at least five to ten business days before the project start date, and more if the project is large, complex, or involves an occupied institutional building. Insurers may require an inspection or additional underwriting information before binding coverage. Starting the conversation late forces you into a position where you may be on site without coverage in place, which is a serious contractual and financial risk.
Request a Quote or Book a Meeting
Boardwalk Insurance works with renovation contractors across Ontario who need coverage that actually reflects the complexity of occupied building projects. Whether you are preparing for a new project, reviewing a contract requirement, or approaching a renewal after a difficult year, our team can help you build an insurance program that closes the gaps that standard builders risk forms leave open. Reach out through the get a quote page or contact us directly to book a meeting with a broker who understands renovation contractor insurance Ontario from the ground up.
You can also explore related coverage areas including commercial general liability for Ontario contractors to make sure your full program is coordinated.
What we need from you
- A description of the project including whether the building will be occupied during construction and the percentage of the building in active use.
- The total completed value of the project including the value of the existing structure if you need that covered.
- The anticipated project start date and substantial completion date including any known extension risk.
- A list of subcontractors you plan to use and whether they carry their own insurance.
- Your WSIB account number and current clearance status.
- Your claims history for the past five years including any losses on renovation or occupied building projects.
- A copy of the contract or tender document if there are specific certificate of insurance requirements you need to meet.
